Sixty-four 10 gb/s WDM channels were transmitted over 7200 km is a spectral bandwidth of 15.1 nm for a spectral efficiency of 0.33 (bits/s)Hz. Error free operation was achieved for all channels.
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Error free propagation of a single polarisation optical time division multiplexed 40 Gbit/s dispersion managed pulsed data stream over dispersion (non-shifted) fibre. This distance is twice the previous record at this data rate.
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500 Gb/s, over 4000 km transmission was moderated with 22 nm-bandwidth EDFAs and low dispersion slope fiber. By reducing the dispersion slope and fiber nonlinearity, the transmission distance was almost doubled compared to the previous experiments with similar capacity.
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Single wavelength soliton transmission at 80 Gbit/s has successfully been performed over 172 km installed fiber. Soliton data with pulse widths of 4.5 ps was transmitted with an average power penalty for all eight time-division-multiplexed channels of 1.3 dB.
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Transmission of 25 and 50 equally 100-GHz and 50-GHz spaced 10-Gb/s (OC-192) channels on the ITU grids is demonstrated over eight and four 83.8-km long spans, respectively, of DSF with the zero-dispersion wavelength within the signal wavelength band. Significant performance improvements are obtained with a pump power of only 440 mW with 55-/spl mu/m/sup 2/ dispersion-shifted fibers because of thei...
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We describe a new world's record for free-space optical communications realized with a 4-channel, 2.5 Gb/s per channel system, operating error-free over a free-space horizontal distance of 4.4 km. This is made possible by three key developments: (1) specialized optical telescope-transceiver terminals, (2) multimode fiber DWDMs and (3) high power 1550 nm Er/Yb optical amplifiers.
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We demonstrate the world's first long term optical PMD compensation for an OC-192 (9.95328 Gb/s SONET) signal on the installed fiber infrastructure of a network operator in East Texas. With a line PMD of 30 ps, BER improvement greater than 4 orders of magnitude has been achieved.
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We report on the field trial experiment of a bi-directional passive optical network for CDMA microcellular systems. This network is useful not only for implementing cost-effective microcellular systems but also for covering the radio-blind areas such as underground shopping malls.
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We report 100-channel transmission of both C- and l-band with 765 Gb/s capacity over a distance of 2,000 km. To achieve this transmission result, we utilized dispersion flattened transmission and broadband medium gain erbium doped fiber amplifiers.
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We demonstrate 100 nm bandwidth Raman amplifiers using 12-wavelength-channel WDM pump laser diode unit. The gain flatness is less than /spl plusmn/0.5 dB, which is achieved through an asymmetric channel allocation of pump and without any gain equalization filters.
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We report a photosensitization process in standard hydrogen loaded optical fiber. A persistent photosensitivity is produced by exposure to UV light that can be uniform or spatially tailored along the fiber length.
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An all-fiber Fourier-transform spectrometer is proposed and demonstrated. The device is simple, compact, and functions as a wavemeter, a network monitor, or a tool for fabrication and testing of very long fiber Bragg gratings.
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A new type of hydrogen aging loss increase of up to 0.21 dB/km at the 1385 nn OH peak can arise in some fibers when exposed to 0.01 atmospheres of hydrogen for less than 4 days at room-temperature.
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Single-end measurement of statistical properties of polarization mode dispersion parameters was carried out by means of a continuous wave scheme based on the analysis of the Fresnel reflection at fiber far-end.
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We present the lowest measurements of timing jitter, to our knowledge, of a harmonically mode-locked fiber laser. Phase detection noise measurements demonstrate a timing jitter of less than 10 fs from 100 Hz to 1 MHz.
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